z/OS DFSORT Application Programming Guide
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EFS01 parameter list

z/OS DFSORT Application Programming Guide
SC23-6878-00

DFSORT sends three words to the EFS01 user exit routine each time it is entered:
  • The address of the extract buffer area
  • The address of the input record
  • The address of the EFS program context area.

DFSORT places the address of a parameter list in register 1. The list begins on a fullword boundary and is three fullwords long. The format of the parameter list is:

The format of the parameter list is:Bytes 1 through 4
Address of the extract buffer area
Address of the input record
Address of the EFS program context area
The EFS01 routine must return one of the following return codes in general register 15:
0
The extraction of the EFS control field was successful.
16
The extraction of the EFS control field was unsuccessful; terminate DFSORT.
Parent topic: EFS01 user exit routine

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